Where pop is mixed with beer? (6)
I believe the answer is:
aleppo
'where' is the definition.
The answer is a location as well as being a singular noun. This is suggested by the definition.
'pop is mixed with beer?' is the wordplay.
'is mixed' indicates an anagram.
'with' is an insertion indicator.
'beer?' becomes 'ale' (type of beer).
'pop' is an anagram of 'ppo'.
'ppo' enclosing 'ale' is 'ALEPPO'.
Can you help me to learn more?
(Other definitions for aleppo that I've seen before include "Largest city in Syria before the massive damage of the civil war" , "Foreign city" , "Ancient city, in Syria" , "Tomorrow" , "War-torn city of Syria" .)